Fig. 3: Comparison of catalyst layers for CO2 reduction to CO in BPMEA cells. | Nature Communications

Fig. 3: Comparison of catalyst layers for CO2 reduction to CO in BPMEA cells.

From: Local ionic transport enables selective PGM-free bipolar membrane electrode assembly

Fig. 3

a Schematic illustration of the CL on a gas-diffusion layer (GDL), the catalyst materials, and the importance of the migration of (bi)carbonate across the Sustainion-based CL for CO2 local regeneration. Faradaic efficiency of b CO and c hydrogen of the CLs versus total current densities. d CO partial current density and e CO2-to-CO utilization efficiency over CLs. f pH changes of 100 mL 0.1 M KOH aqueous anolyte as a function of CLs before and after cell tests (6300C total charge) under 50–300 mA cm−2. The error bar represents standard deviations over at least three tests.

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